EP0246047B1 - Panels of microporous thermal insulation - Google Patents

Panels of microporous thermal insulation Download PDF

Info

Publication number
EP0246047B1
EP0246047B1 EP87304146A EP87304146A EP0246047B1 EP 0246047 B1 EP0246047 B1 EP 0246047B1 EP 87304146 A EP87304146 A EP 87304146A EP 87304146 A EP87304146 A EP 87304146A EP 0246047 B1 EP0246047 B1 EP 0246047B1
Authority
EP
European Patent Office
Prior art keywords
polyvinyl acetate
thermal insulation
insulation material
substrate
microporous thermal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87304146A
Other languages
German (de)
French (fr)
Other versions
EP0246047A1 (en
Inventor
Joseph Anthony Mcwilliams
James David Joseph Jackson
Derek Edward Morgan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Micropore International Ltd
Original Assignee
Micropore International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micropore International Ltd filed Critical Micropore International Ltd
Priority to AT87304146T priority Critical patent/ATE47981T1/en
Publication of EP0246047A1 publication Critical patent/EP0246047A1/en
Application granted granted Critical
Publication of EP0246047B1 publication Critical patent/EP0246047B1/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal

Definitions

  • the present invention relates to the manufacture of panels of microporous thermal insulation, and in particular relates to the manufacture of panels of microporous thermal insulation in which the insulation material is bonded to a substrate.
  • Microporous thermal insulation materials are materials which have a lattice structure in which the average interstitial dimension is less than the mean free path of the molecules of air or other gas in which the material is arranged. This results in a heat flow which is less than that attributable to the molecular heat diffusion of air or other gas in which the material is used.
  • the lattice structure is created within a powder material by using a powder with very fine particles in a chain-like formation which adhere to each other.
  • a suitable powder for providing this structure is finely divided silica in the forms normally referred to as silica aerogel or pyrogenic silica, although other materials are also available.
  • the powder may be strengthened by the addition of reinforcing fibre such as ceramic fibre and an opacifier may be added to provide infra-red opacification.
  • the microporous thermal insulation material may be formed into a panel by compressing the material.
  • a panel has limited strength and is friable and readily broken.
  • the nature of the consolidated microporous thermal insulation material makes it particularly difficult to cause the material to bond to other substrates and this results in problems in the production of robust panels of microporous thermal insulation material.
  • a method of manufacturing a panel of microporous thermal insulation which method comprises the steps of:
  • microporous thermal insulation materials will adhere to some substrates and not to others in an unpredictable and apparently inconsistent manner. In particular, we have found that it is especially difficult to cause the microporous materials to adhere to a substantially rigid substrate.
  • the substrate is coated with a film of polyvinyl acetate emulsion the microporous material will readily adhere to the substrate when compacted there against.
  • the substrate may be substantially rigid, for example a metallic material such as steel.
  • the polyvinyl acetate may be applied by brushing or spraying.
  • the polyvinyl acetate may comprise an aqueous emulsion containing from 10 to 50 per cent by weight polyvinyl acetate.
  • the film of polyvinyl acetate may have a thickness up to about 0.5mm.
  • the polyvinyl acetate is preferably allowed to dry prior to compacting the powdery microporous thermal insulation material, for example for up to one hour.
  • the figure shows a substrate I such as a sheet of steel to which a film 2 of polyvinyl acetate emulsion is applied.
  • the emulsion may be applied by brushing or spraying and is, for example, an aqueous emulsion containing from 10 to 50 per cent by weight polyvinyl acetate.
  • Emulsions having a relatively low solids content may be applied by spraying, whereas emulsions having a relatively high solids content are generally applied by brushing.
  • the thickness of the film applied to the substrate may be up to about 0.5mm.
  • the film of polyvinyl acetate is allowed to dry. It is preferable that the film should be dry to touch, which can take up to I hour, but this is not essential.
  • the powdery microporous thermal insulation material 3 is then compacted against the film on the surface of the substrate. We have found that the insulation material remains bonded to the substrate at temperatures up to about 400 ° C.

Abstract

A panel of microporous thermal insulation material is manufactured by applying a film (2) of polyvinyl acetate emulsion to a non-porous substrate (l), such as a sheet of steel, and compacting powdery microporous thermal insulation material (3) against the film so as to cause the consolidated insulation material to bond to the substrate and form a panel.

Description

  • The present invention relates to the manufacture of panels of microporous thermal insulation, and in particular relates to the manufacture of panels of microporous thermal insulation in which the insulation material is bonded to a substrate.
  • Microporous thermal insulation materials are materials which have a lattice structure in which the average interstitial dimension is less than the mean free path of the molecules of air or other gas in which the material is arranged. This results in a heat flow which is less than that attributable to the molecular heat diffusion of air or other gas in which the material is used. The lattice structure is created within a powder material by using a powder with very fine particles in a chain-like formation which adhere to each other. A suitable powder for providing this structure is finely divided silica in the forms normally referred to as silica aerogel or pyrogenic silica, although other materials are also available. The powder may be strengthened by the addition of reinforcing fibre such as ceramic fibre and an opacifier may be added to provide infra-red opacification.
  • The microporous thermal insulation material may be formed into a panel by compressing the material. However, such a panel has limited strength and is friable and readily broken. The nature of the consolidated microporous thermal insulation material makes it particularly difficult to cause the material to bond to other substrates and this results in problems in the production of robust panels of microporous thermal insulation material.
  • It is an object of the present invention to provide a method of manufacturing panels of microporous thermal insulation which are bonded to a substrate.
  • According to the present invention there is provided a method of manufacturing a panel of microporous thermal insulation, which method comprises the steps of:
    • applying a film of a polyvinyl acetate emulsion to a non-porous substrate; and
    • compacting powdery microporous thermal insulation material against the film so as to cause the consolidated insulation material to bond to the substrate and form a panel.
  • We have previously found that microporous thermal insulation materials will adhere to some substrates and not to others in an unpredictable and apparently inconsistent manner. In particular, we have found that it is especially difficult to cause the microporous materials to adhere to a substantially rigid substrate.
  • However, we have now found that if the substrate is coated with a film of polyvinyl acetate emulsion the microporous material will readily adhere to the substrate when compacted there against.
  • The substrate may be substantially rigid, for example a metallic material such as steel.
  • The polyvinyl acetate may be applied by brushing or spraying. The polyvinyl acetate may comprise an aqueous emulsion containing from 10 to 50 per cent by weight polyvinyl acetate. The film of polyvinyl acetate may have a thickness up to about 0.5mm.
  • The polyvinyl acetate is preferably allowed to dry prior to compacting the powdery microporous thermal insulation material, for example for up to one hour.
  • For a better understanding of the present invention and to show more clearly how it may be carried into effect reference will now be made, by way of example, to the accompanying figure which is a diagrammatic illustration of a panel of microporous thermal insulation material bonded to a substrate in accordance with the present invention.
  • The figure shows a substrate I such as a sheet of steel to which a film 2 of polyvinyl acetate emulsion is applied. The emulsion may be applied by brushing or spraying and is, for example, an aqueous emulsion containing from 10 to 50 per cent by weight polyvinyl acetate. Emulsions having a relatively low solids content may be applied by spraying, whereas emulsions having a relatively high solids content are generally applied by brushing. The thickness of the film applied to the substrate may be up to about 0.5mm.
  • The film of polyvinyl acetate is allowed to dry. It is preferable that the film should be dry to touch, which can take up to I hour, but this is not essential. The powdery microporous thermal insulation material 3 is then compacted against the film on the surface of the substrate. We have found that the insulation material remains bonded to the substrate at temperatures up to about 400°C.

Claims (8)

  1. I. A method of manufacturing a panel of microporous thermal insulation material characterised by the steps of:
    -applying a film of a polyvinyl acetate emulsion to a non-porous substrate; and
    -compacting powdery microporous thermal insulation material against the film so as to cause the consolidated insulation material to bond to the substrate and form a panel.
  2. 2. A method according to claim I, characterised in that the substrate is substantially rigid.
  3. 3. A method according to claim 2, characterised in that the substrate comprises a metallic material such as steel.
  4. 4. A method according to claims 1,2 or 3, characterised in that the polyvinyl acetate is applied by brushing or spraying.
  5. 5. A method according to any preceding claim, characterised in that the polyvinyl acetate comprises an aqueous emulsion containing from 10 to 50 per cent by weight polyvinyl acetate.
  6. 6. A method according to any preceding claim, characterised in that the film of polyvinyl acetate has a thickness up to about 0.5mm.
  7. 7. A method according to any preceding claim, characterised in that the polyvinyl acetate is allowed to dry prior to compacting the powdery microporous thermal insulation material.
  8. 8. A method according to claim 7, characterised in that the polyvinyl acetate is allowed to dry for up to one hour.
EP87304146A 1986-05-14 1987-05-11 Panels of microporous thermal insulation Expired EP0246047B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87304146T ATE47981T1 (en) 1986-05-14 1987-05-11 PLATE WITH MICROPOROUS THERMAL INSULATION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868611785A GB8611785D0 (en) 1986-05-14 1986-05-14 Panels of microporous thermal insulation
GB8611785 1986-05-14

Publications (2)

Publication Number Publication Date
EP0246047A1 EP0246047A1 (en) 1987-11-19
EP0246047B1 true EP0246047B1 (en) 1989-11-15

Family

ID=10597875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304146A Expired EP0246047B1 (en) 1986-05-14 1987-05-11 Panels of microporous thermal insulation

Country Status (10)

Country Link
US (1) US4792466A (en)
EP (1) EP0246047B1 (en)
JP (1) JPH0751338B2 (en)
AT (1) ATE47981T1 (en)
AU (1) AU604701B2 (en)
CA (1) CA1272434A (en)
DE (1) DE3760983D1 (en)
ES (1) ES2011801B3 (en)
GB (1) GB8611785D0 (en)
ZA (1) ZA872981B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8826163D0 (en) * 1988-11-08 1988-12-14 Micropore International Ltd Panels of thermal insulating material
US5598274A (en) * 1989-11-10 1997-01-28 Canon Kabushiki Kaisha Image signal recording and reproducing system
DE4121626A1 (en) * 1991-06-29 1993-01-14 Bayer Ag PROCESS FOR PRODUCING HYDRAULIC BINDER CONTAINING MATERIALS, IN PARTICULAR GIPBINDING
GB2284172B (en) * 1993-11-25 1997-07-30 Ceramaspeed Ltd Method of forming compacted layer
US5746932A (en) * 1996-11-14 1998-05-05 Solv-Ex Corporation Method for producing thermal insulation from dry-fine oil-sands tailings

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE315713B (en) * 1968-01-19 1969-10-06 Creative Build Materials Cebem
GB1350661A (en) * 1970-06-10 1974-04-18 Micropore International Ltd Thermal insulating materials
US3869334A (en) * 1971-06-10 1975-03-04 Micropore Insulation Limited Insulating materials
CA1078722A (en) * 1975-03-03 1980-06-03 Lamonte R. Koonts Insulation board
US4221672A (en) * 1978-02-13 1980-09-09 Micropore International Limited Thermal insulation containing silica aerogel and alumina
US4158073A (en) * 1978-03-23 1979-06-12 Armstrong Cork Company Process for producing decorative multi-level embossed surface covering
DE3046127C2 (en) * 1979-12-14 1984-05-30 Micropore International Ltd., Droitwich, Worcestershire Method of treating the surface of blocks of microporous thermally insulating material
US4517240A (en) * 1982-02-22 1985-05-14 National Starch And Chemical Corporation Process for preparing fiberboard
DE3225786A1 (en) * 1982-07-09 1984-01-12 Stankiewicz Schallschluck Mat having airborne sound-insulating and structure-borne sound-reducing properties
SE466299B (en) * 1983-08-04 1992-01-27 Micropore International Ltd HEAT-INSULATING BODY AND MAKING IT MANUFACTURED, INCLUDING A REINFORCING HONEY STRUCTURE AND A HEATING INSULATION MATERIAL
DE3343330A1 (en) * 1983-11-28 1985-06-05 Günter Hans 1000 Berlin Kiss METHOD FOR PRODUCING THERMOPLASTICALLY DEFORMABLE DECOR FILM OF SURFACE-COVERED MOLDED PARTS
GB8404602D0 (en) * 1984-02-22 1984-03-28 Micropore International Ltd Thermal insulation material

Also Published As

Publication number Publication date
US4792466A (en) 1988-12-20
AU604701B2 (en) 1991-01-03
GB8611785D0 (en) 1986-06-25
ES2011801B3 (en) 1990-02-16
ZA872981B (en) 1988-01-27
ATE47981T1 (en) 1989-12-15
JPH0751338B2 (en) 1995-06-05
EP0246047A1 (en) 1987-11-19
CA1272434A (en) 1990-08-07
JPS62271737A (en) 1987-11-26
AU7296987A (en) 1987-11-19
DE3760983D1 (en) 1989-12-21

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